Phaladeepika
नॄणां द्वादशवत्सरा दशहता ह्यायुःप्रमाणं परै- राख्यातं परमं शनेस्त्रिभगणं यावत्परैरीरितम् । कैश्चिच्चन्द्रसहस्रदर्शनमिह प्रोक्तं कलौ किन्तु यत् वेदोक्तं शरदः शतं हि परमायुर्दायमाचक्ष्महे ॥ २६॥
The full period of life in the case of men has been declared as 120 years (12 X 10) by some. Others there are who have stated that the full lifeperiod will be the time taken by Saturn to make 3 complete revolutions (in his orbit). There is a third school who say that the full life-period of a man is the time taken by the Moon for making 1000 revolutions. But we are of opinion that the full period of man's life in this Kaliyuga is only 100 years as stated in the Vedas.
english translation
nRRNAM dvAdazavatsarA dazahatA hyAyuHpramANaM parai- rAkhyAtaM paramaM zanestribhagaNaM yAvatparairIritam । kaizciccandrasahasradarzanamiha proktaM kalau kintu yat vedoktaM zaradaH zataM hi paramAyurdAyamAcakSmahe ॥ 26॥
hk transliteration by Sanscript